Storage enhancement techniques for digital memory based, analog computational engines

We propose a multi-chip organization for Winner-Takes-All associative memory (WAM) systems for processing sensory information such as speech. Using mixed analog/digital circuit techniques, this hardware solution has great advantages, such as portable size, low power consumption for battery operation and low cost for personal use. A Winner-offset circuit performs a close competitor detection and process variation adjustment to enhance existing memory capacity. We report on experimental data from test chips. Maximum capability of the circuit is estimated based on a process variation model of MOS transistors